748 Area Code
Area code 748 serves Greeley, Firestone, Durango, Milliken, Eagle and nearby communities in Colorado. It has been in service since July 7, 2025, when it was split from 970.
Who issues 748 numbers
Share of the 8 prefixes (the three digits after 748) assigned to each type of carrier. Classification by carrier name, approximate.
| Carrier | Prefixes |
|---|---|
| Onvoy (Sinch) | 5 |
| Wide Voice | 3 |
Cities and towns in area code 748
| City | Population | Other area codes |
|---|---|---|
| Greeley | 115,073 | 970 |
| Firestone | 20,129 | 970 |
| Durango | 19,733 | 970 |
| Milliken | 9,183 | 970 |
| Eagle | 7,280 | 970 |
| Mead | 7,042 | 970 |
| Estes Park | 5,780 | 970 |
Got a call from 748?
A 748 number was originally issued in Colorado, but that does not prove the caller is there. 63% of 748 prefixes belong to VoIP and cable providers, whose numbers can be bought online and used from anywhere. Caller ID can also be spoofed, so treat urgent requests for money, codes or passwords from any area code with suspicion, and call back on a number you already know.
All 8 prefixes in area code 748
Format: (748) XXX-YYYY. Carrier is the company the block was originally assigned to; numbers may since have been ported to another carrier.
748-222Wide Voice · Durango748-333Wide Voice · Eagle748-666Onvoy (Sinch) · Fraser748-777Onvoy (Sinch) · Greeley748-800Onvoy (Sinch) · Gilcrest748-888Wide Voice · Mead748-900Onvoy (Sinch) · Ignacio748-999Onvoy (Sinch) · Estes Park
Questions about area code 748
- Where is area code 748?
- Area code 748 is in Colorado. It covers Greeley, Firestone, Durango, Milliken, Eagle, Mead and 1 more cities and towns.
- What time zone is area code 748?
- Area code 748 is in the Mountain time zone.
- Is 748 a toll-free number?
- No. 748 is a geographic area code in Colorado. Toll-free numbers in the US start with 800, 833, 844, 855, 866, 877 or 888.
- Why does 748 share its area with 970?
- 748 and 970 form an overlay: they cover the same territory, so new numbers there can get any of these codes, and local calls need all 10 digits.
- Will area code 748 run out of numbers?
- NANPA's latest forecast projects the 748/970 overlay to exhaust in the fourth quarter of 2088. Before that happens, a new area code is usually added as an overlay; existing numbers keep their code.